72890028 has 36 divisors (see below), whose sum is σ = 185607240. Its totient is φ = 24117696.

The previous prime is 72890017. The next prime is 72890039. The reversal of 72890028 is 82009827.

It is an interprime number because it is at equal distance from previous prime (72890017) and next prime (72890039).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 72889974 and 72890001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2458 + ... + 12321.

Almost surely, 2^72890028 is an apocalyptic number.

It is an amenable number.

72890028 is an abundant number, since it is smaller than the sum of its proper divisors (112717212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72890028 is a wasteful number, since it uses less digits than its factorization.

72890028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14926 (or 14921 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 72890028 is about 8537.5656952084. The cubic root of 72890028 is about 417.7239464513.

The spelling of 72890028 in words is "seventy-two million, eight hundred ninety thousand, twenty-eight".